many new and used engine parts available not shown on this page. Engine cases, cylinders, cyl. heads, valve covers, rocker arms, transmission/gearshift parts,etc.

E-mail with your needs.

 Top End Gasket set for XL350 incl. valve stem seals. Quality set. $52.00


Complete Gasket set for XL350 with std. head gasket,



Complete gasket set for the late style (74/75) XL250, $52.00

same set for the early style (72/73) 68.00

Both sets include the valve stem seals

Cylinder boring;$90.00 + shipping. This work is thru a professional shop that has been boring small engines for over 20 years.

Cometic cylinder head gaskets for 86mm and 89mm over-bore, $30.00; made from the proper fiber and fire ring combination, .059" thickness. (Also available in copper, email for prices.)

NEWS-----I now have new intake valves in stock for the 250 & 350. these are extremely good quality custom made steel valves in stock sizes and use stock keepers. In most all cases the exhaust valves are good to reuse.

$40.00 each

Wiseco piston kits


available for most post 78 model XL250/350/500/600.   10.5 to 1 comp. racing style pistons. e-mail for price and availability.


285cc big bore kit for the XL250, 1972 thru 1977. includes: JE forged piston,rings,pin,clips,head and base gasket. $240.00


NOW IN STOCK - Shipping is extra



for the 72 thru 77 XL250

.040 oversize forged piston with stock compression.

$225.00 + shipping

xl3 rod piston kit  001


rod/ piston kit
This kit includes everything pictured and a head gasket. The piston is a 2 ring racing style 84mm and takes the motor to 390cc. $340.00 + shipping. 
A. Install the rod on your crank, add $100.00. 
B. Bore your cylinder, add $100.00


this is a 2 ring racing style piston and will NOT deliver the long life of a standard 3 ring piston.


75.5 mm high comp. racing style forged piston kit.  Made in the US.  Aprox. 11:1 compression. $225.00 + shipping. The dome can be milled down some for lower compression.

1972 - 1977



 .040 oversize stock comp. piston kit

$225.00 + shipping




.040 oversize high comp. piston kit.

$225.00 + shipping









1973 - 1978

86mm big bore piston kit

takes the motor to 412cc

bore your stock cyl. for a great power increase.


includes head and base gasket, shipping extra


2nd over stock compression forged piston kit for the 1984/85 models with 19mm wrist pin

$245.00 +shipping and includes the head and base gasket



I now have new oil pump rotors in stock, replace them before they break and ruin your motor.


I will rebuild your oil pump if the body is good, replace the rotors, gasket and O rings, lap the body halves. $60.00 + shipping

Megacycle Cams




NOW IN STOCK---Megacycle cams,both billet and needle bearing,. E-mail for current pricing

NOTE: hardweld rocker arms MUST be used with these cams. No warranty if not used. Sold exchange for your old ones. $240.00


I am an authorized Megacycle cam dealer, e-mail for pricing and availability on any motorcycle.


ALSO--- line boring heads for the needle bearing cams. $150.00



 XL250 and 350

R&D high performance valve spring set with alloy tops

$165.00 + shipping






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